GReddy 11900151 TD Turbo Outlet Gasket External Wastegate 4-Bolt TD07S T78 T88 T88H

The GReddy 11900151 is a high-pressure metal composite turbo outlet gasket designed for the external wastegate (EXT) outlet flange on GReddy TD07S, T78, T88, and T88H turbochargers. Engineered as a direct OEM-spec replacement, this gasket seals the 4-bolt turbine outlet flange to prevent exhaust leaks and maintain boost integrity under high-temperature, high-pressure competition conditions.

Key Features:

• Metal composite construction with metal O-ring for superior high-pressure sealing
• 4-bolt flange pattern — fits TD07S, T78, T88, and T88H external wastegate outlet
• 81mm diameter turbine outlet flange opening
• Designated Gasket Type #12 in the official GReddy Turbo Gasket Reference Guide
• OEM GReddy specification — direct replacement for worn or removed gaskets
• Designed for the GReddy/Mitsubishi TD-series turbine housing family

GReddy recommends replacing the turbo flange gasket any time it is removed, ensuring a leak-free seal every time. This gasket is an essential service part for anyone rebuilding, servicing, or installing a GReddy T78, T88, or TD07S-based turbo system.